摘要
目的探讨典型地下停车场颗粒物(PM)、总挥发性有机物(TVOC)、苯系物(苯、甲苯、二甲苯,BTX)浓度的时空分布特点。方法对西安市自然通风式地下停车场进行四季监测,统计分析地下停车场PM、BTX浓度与内外部环境因素的关系。结果地下停车场PM冬季污染严重,出口处浓度较高;TVOC、BTX夏季污染严重,交通核心处浓度较高;污染物浓度日变化呈现出下午和晚上较高的特点;污染物浓度与出口车流量之间存在统计学相关性(P<0.01)。结论地下停车场内PM_(2.5)和PM_(10)浓度的四季变化主要受室外颗粒物浓度影响,其内部环境是BTX产生季节性差异的重要因素。交通活动是BTX的主要来源,停车场内污染物浓度的日变化主要取决于交通量。停车场内机动车活动可能是地下停车场污染物的主要来源。
Objective To understand the spatial and temporal distribution characteristics of particulate matter(PM),total volatile organic compounds(TVOC)and benzene,toluene,xylene(BTX)concentrations in the typical underground parking garages(UPGs).Methods Natural ventilation UPGs in Xian city were monitored in four seasons,and the relationship between PM,TVOC and BTX concentrations in UPGs and internal and external environmental factors was statistically analyzed.Results UPGs'PM pollution was severe in winter,with higher concentrations at the exit.TVOC and BTX pollution was severe in summer,with higher concentrations at the core of the traffic.The diurnal variation of pollutants indicated that concentrations were higher in the afternoon and evening.There was a significant relationship between pollutant concentrations and exit vehicle flow(P<0.01).Conclusion Seasonal variations of PM_(2.5) and PM_(10) concentrations in UPGs are mainly influenced by outdoor particulate matter concentrations,and the indoor physical environment is an important factor in generating seasonal variations of BTX.Traffic activities are the main source of BTX.Daily variations of indoor pollutant concentrations are mainly dependent on traffic volumes.The correlation between BTX and TVOC suggested that internal motor vehicle activity emissions may be a major source of pollutants from UPGs.
作者
王鉴月
张亚楠
张力元
司建廷
孙苑菡
WANG Jian-yue;ZHANG Ya-nan;ZHANG Li-yuan;SI Jian-ting;SUN Yuan-han(The Twelfth Divion,Institute for Hygiene of Ordnance Industry,Xi'an,Shaanxi 710065,China;不详)
出处
《环境与健康杂志》
2024年第12期1050-1055,共6页
Journal of Environment and Health
基金
国家自然科学基金青年项目(42207130)。
关键词
地下停车场
自然通风
苯系物
颗粒物
变化特征
Underground parking garages
Natural ventilation
Benzene,toluene,xylene
PM
Change characteristics
